The calculated distance (air line) between Wu King and Siu Lek Yuen is approximately 16 miles respectively 25 kilometers.
By car or train, the actual journey to Siu Lek Yuen is certainly longer, as only the direct route (as the crow flies) between Wu King and Siu Lek Yuen has been calculated here.
Air line (approximately)
25 kilometers
14 nautical miles